CN105703073A - Tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance - Google Patents
Tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance Download PDFInfo
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- CN105703073A CN105703073A CN201610218869.2A CN201610218869A CN105703073A CN 105703073 A CN105703073 A CN 105703073A CN 201610218869 A CN201610218869 A CN 201610218869A CN 105703073 A CN105703073 A CN 105703073A
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- rabbet joint
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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Abstract
A tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance belongs to a slot antenna. The antenna is composed of three single-polarized antennas (13) vertical to each other; each antenna (13) comprises a dielectric substrate (1), a metal ground (3) and a radiation slot (3) on the dielectric substrate, and a coaxial feeder; the metal ground (2) is provided with the radiation slot (3) and a plurality of parallel grid slits (6); two ends of the radiation slot (3) are short-circuited; a plurality of capacitors (7) are connected in parallel in the middle of the radiation slot (3) and bridged at the edge thereof to form a low-impedance slot (8); the rest part of the radiation slot (3) is the high-impedance slot (9); a conductor (5) out of the coaxial feeder (4) is connected with the metal ground (2), the conductor (12) in the tail end thereof is connected with the metal ground (2) after bridging at the edge (11) of the high-impedance slot (9). The antenna is in multiband working, capable of reducing antenna size, cross polarization and shielding and improving isolation.
Description
Technical field
The present invention relates to a kind of slot antenna, three polarization slot antennas of especially a kind of grid seam ground coaxial feed capacitive load Stepped Impedance。
Background technology
Slot antenna is the antithesis antenna of element antenna, has a wide range of applications。But, common slot antenna not only radiates the length of the line of rabbet joint itself 1/2nd wavelength, and radiate and also need to bigger Metal ground around the line of rabbet joint and amass, big 1/2nd wavelength of length of the length ratio line of rabbet joint on usual metal ground, big 1/2nd wavelength of width of the width ratio line of rabbet joint on metal ground。Multipolarization MIMO can effectively improve spectrum efficiency and channel capacity, in order to MIMO technology may apply to the terminal that volume is little, it is necessary to the not like-polarized co-located placement of antenna。The radiation of antenna can be produced occlusion effect by bigger metal ground, slot antenna is made to be not suitable for co-located multiple-input and multiple-output (MIMO) application, when using in particular as multi-polarization antenna, the isolation caused between the cross polarization variation of antenna, antenna port is deteriorated by big metal ground, and these all will cause the decline of spectrum efficiency and channel capacity。The impedance of the line of rabbet joint is very big simultaneously, and the impedance matching also making slot antenna feeding transmission line is relatively difficult。The simultaneously development of modern communications also requires that antenna can multiband operation and two frequency bands can regulate respectively。
Summary of the invention
Technical problem: the purpose of the present invention is to propose to three polarization slot antennas of a kind of grid seam ground coaxial feed capacitive load Stepped Impedance, this antenna has been possible not only to multiple working band, and multiple frequency band can regulate respectively；This antenna can reduce the length of the radiation line of rabbet joint and the area on metal ground, and have and suppress cross polarization, improvement to isolate, reduce the effect blocked。
Technical scheme: three polarization slot antennas of the grid seam ground coaxial feed capacitive load Stepped Impedance of the present invention include the grid seam ground capacitive load Stepped Impedance antenna of three single polarizations being mutually perpendicular to placement；The grid seam ground capacitive load Stepped Impedance antenna of each single polarization includes medium substrate, the metal that is arranged on medium substrate and the radiation line of rabbet joint, coaxial feeder；The one side of medium substrate is metal ground, is affixed the outer conductor of coaxial feeder and metal and is connected；Metal has the radiation line of rabbet joint on the ground, and the shape of the radiation line of rabbet joint is rectangle, and the radiation line of rabbet joint is positioned at the center on metal ground；The metal grid slot array that a plurality of parallel gate seam is constituted on the ground, the shape of grid seam is rectangle, and grid seam is positioned at the surrounding of the radiation line of rabbet joint, and grid seam is mutually perpendicular to the radiation line of rabbet joint；The short at one end of grid seam；The other end open circuit of grid seam, is positioned at the edge of medium substrate；Two terminal shortcircuits of the radiation line of rabbet joint；At radiation line of rabbet joint mid portion, there is several Capacitance parallel connection to be connected across two edges of the radiation line of rabbet joint so that the characteristic impedance step-down of radiation line of rabbet joint mid portion, form the low-resistance line of rabbet joint；The remainder of the radiation line of rabbet joint is the high resistant line of rabbet joint, and the high resistant line of rabbet joint constitutes the Stepped Impedance radiation line of rabbet joint together with the low-resistance line of rabbet joint, produces a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Metallization via pass through medium substrate, one with metal be connected, other end is at the another side of medium substrate；One end of coaxial feeder is the port of antenna, and the inner wire of the coaxial feeder other end strides across the high resistant line of rabbet joint, at the edge of the high resistant line of rabbet joint, with metal be connected。
Change the thickness of medium substrate, pcrmeability and dielectric constant, the high resistant line of rabbet joint and the characteristic impedance of the low-resistance line of rabbet joint can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change the length of the low-resistance line of rabbet joint, low-resistance line of rabbet joint position in the radiation line of rabbet joint, the electrical length of the radiation line of rabbet joint can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change the spacing of adjacent gate seam in grid slot array, the width of grid seam, grid seam short-circuit end from the distance of the radiation line of rabbet joint, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint。
Change the quantity of loading capacitance, capacitance and spacing, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change the width of the radiation line of rabbet joint, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint and the high resistant line of rabbet joint, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
The electrical length of grid seam should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized rising。
Capacitance parallel connection is loaded into two edges of the radiation line of rabbet joint, the characteristic impedance not only making line of rabbet joint transmission line is reduced to and is prone to and feeding transmission lines matching volume, but also reducing the phase velocity of line of rabbet joint transmission line so that the length of the half-wavelength radiation line of rabbet joint reduces, it is achieved the miniaturization of the radiation line of rabbet joint and then antenna。The operating frequency of low frequency operation frequency band and the operating frequency of high-frequency work frequency band of three polarization slot antennas of grid seam ground coaxial feed capacitive load Stepped Impedance are mainly determined by the resonant frequency of the radiation line of rabbet joint, but the operating frequency of antenna and matching degree can also be adjusted by the position that the size on metal ground, coaxial feeder inner wire are connected with the radiation line of rabbet joint。Owing to the radiation existing low-resistance line of rabbet joint of the line of rabbet joint has again the high resistant line of rabbet joint, constitute the radiation line of rabbet joint of Stepped Impedance, not only make antenna miniaturization, reduce cross polarization, also reduce the size on metal ground, improve isolation and reduce the occlusion effect on metal ground, and it is also possible that antenna has multiple working band, and change relative length and the impedance of the low-resistance line of rabbet joint and the high resistant line of rabbet joint, it is possible to adjust the position of two working bands respectively。The radiation line of rabbet joint is formed periodic loading by metal grid seam on the ground, makes again the radiation line of rabbet joint become periodic slow-wave structure, further reduces the electric size of antenna；Simultaneously because the direction of grid seam is vertical with the direction of the radiation line of rabbet joint, inhibit metal on the ground along the electric current in radiation line of rabbet joint direction, and make the more concentration along the remaining CURRENT DISTRIBUTION radiating line of rabbet joint direction, thus reducing cross-polarized radiation, improve the isolation between antenna port, also reduce the size on metal ground, reduce the occlusion effect on metal ground。
Beneficial effect: three polarization slot antennas of the grid seam ground coaxial feed capacitive load Stepped Impedance of the present invention provide the benefit that, this antenna can reduce the electric size of whole antenna, realize miniaturization, this antenna has been possible not only to multiple frequency band simultaneously, and multiple frequency band can regulate respectively, also there is the cross polarization of suppression antenna, improve and isolate between port, and reduce the effect blocked on metal ground。
Accompanying drawing explanation
Fig. 1 is three polarization slot antenna overall structure schematic diagrams of grid seam ground coaxial feed capacitive load Stepped Impedance。
Fig. 2 be grid seam ground coaxial feed capacitive load Stepped Impedance three polarization slot antennas in single polarization grid seam ground capacitive load Stepped Impedance antenna structural representation。
Figure has: the grid seam ground capacitive load Stepped Impedance antenna 13 of medium substrate 1, metal ground 2, the radiation line of rabbet joint 3, coaxial feeder 4, outer conductor 5, grid seam 6, electric capacity 7, the low-resistance line of rabbet joint 8, the high resistant line of rabbet joint 9, port 10, edge 11, inner wire 12 and single polarization。
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described。
Embodiment of the present invention is: three polarization slot antennas of grid seam ground coaxial feed capacitive load Stepped Impedance include the grid seam ground capacitive load Stepped Impedance antenna 13 of three single polarizations being mutually perpendicular to placement；The grid seam ground capacitive load Stepped Impedance antenna 13 of each single polarization includes medium substrate 1, the metal that is arranged on medium substrate 1 ground 2 and the radiation line of rabbet joint 3, coaxial feeder 4；The one side of medium substrate 1 is metal ground 2, and the outer conductor 5 of coaxial feeder 4 is affixed with metal ground 2 and is connected；Having the radiation line of rabbet joint 3 on metal ground 2, the shape of the radiation line of rabbet joint 3 is rectangle, and the radiation line of rabbet joint 3 is positioned at the center on metal ground 2；On metal ground 2, the grid of a plurality of parallel gate seam 6 composition stitch 6 arrays, and the shape of grid seam 6 is rectangle, and grid seam is positioned at the surrounding of the radiation line of rabbet joint 3, and grid seam 6 is mutually perpendicular to the radiation line of rabbet joint 3；The short at one end of grid seam 6；The other end open circuit of grid seam 6, is positioned at the edge of medium substrate 1；Two terminal shortcircuits of the radiation line of rabbet joint 3；At the radiation line of rabbet joint 3 mid portion, there is several electric capacity 7 to be connected in parallel across two edges of the radiation line of rabbet joint 3 so that the characteristic impedance step-down of the radiation line of rabbet joint 3 mid portion, form the low-resistance line of rabbet joint 8；The remainder of the radiation line of rabbet joint 7 is the high resistant line of rabbet joint 9, and the high resistant line of rabbet joint 9 constitutes Stepped Impedance together with the low-resistance line of rabbet joint 8 and radiates the line of rabbet joint 3, produces a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Metallization via 7 passes through medium substrate 1, and one is connected with metal ground 2, and other end is at the another side of medium substrate 1；One end of coaxial feeder 4 is the port 10 of antenna, and the inner wire 12 of coaxial feeder 4 other end strides across the high resistant line of rabbet joint 9, at the edge 11 of the high resistant line of rabbet joint 9, is connected with metal ground 2。
Change the thickness of medium substrate 1, pcrmeability and dielectric constant, the high resistant line of rabbet joint 9 and the characteristic impedance of the low-resistance line of rabbet joint 8 can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change the length of the low-resistance line of rabbet joint 8, the low-resistance line of rabbet joint 8 position in the radiation line of rabbet joint 3, the electrical length of the radiation line of rabbet joint 3 can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change that grid stitch the spacing of the seam of adjacent gate in 6 arrays 6, the width of grid seam 6, grid stitch 6 short-circuit ends distance from the radiation line of rabbet joint 3, thus it is possible to vary the electrical length of the operating frequency of antenna, the width of working band and the radiation line of rabbet joint 3。
Change the quantity of loading capacitance 7, capacitance and spacing, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint 8, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
Change the width of the radiation line of rabbet joint 3, it is possible to regulate the characteristic impedance of the low-resistance line of rabbet joint 8 and the high resistant line of rabbet joint 9, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint 3, and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
The electrical length of grid seam 6 should not be taken at 1/4th, to avoid causing resonance radiation, causes cross-polarized rising。
The operating frequency of low frequency operation frequency band and the operating frequency of high-frequency work frequency band of three polarization slot antennas of grid seam ground coaxial feed capacitive load Stepped Impedance are mainly determined by the resonant frequency of the radiation line of rabbet joint 3, but the operating frequency of antenna and matching degree can also be adjusted by the position that the size on metal ground 2, coaxial feeder 4 inner wire 12 are connected with the radiation line of rabbet joint 3。Owing to the radiation existing low-resistance line of rabbet joint 8 of the line of rabbet joint 3 has again the high resistant line of rabbet joint 9, constitute the radiation line of rabbet joint 3 of Stepped Impedance, not only make antenna miniaturization, reduce cross polarization, also reduce the size on metal ground 2, improve isolation and reduce the occlusion effect on metal ground 2, and it is also possible that antenna has multiple working band, and change the low-resistance line of rabbet joint 8 and the relative length of the high resistant line of rabbet joint 9, position and impedance, it is possible to adjust the position of two working bands respectively。The radiation line of rabbet joint 3 is formed periodic loading by the grid seam 6 on metal ground 2, makes again the radiation line of rabbet joint 3 become periodic slow-wave structure, further reduces the electric size of antenna；Simultaneously because the direction of grid seam 6 is vertical with the direction of the radiation line of rabbet joint 3, inhibit the electric current along the radiation line of rabbet joint 3 direction on metal ground 2, and make the more concentration along the remaining CURRENT DISTRIBUTION radiating the line of rabbet joint 3 direction, thus reducing cross-polarized radiation, improve the isolation between antenna port, also reduce the size on metal ground 2, reduce the occlusion effect on metal ground 2。
In technique, three polarization slot antennas of grid seam ground coaxial feed capacitive load Stepped Impedance both can adopt common printed circuit board (PCB) (PCB) technique, it would however also be possible to employ the integrated circuit technologies such as LTCC (LTCC) technique or CMOS, Si substrate realize。Electric capacity 7 can select the patch capacitor 7 of corresponding encapsulation the distance according to electric capacity 7 two pins electrode according to operating frequency, selects the width of the low-resistance line of rabbet joint 8。On manufacturing, the grid of three single polarizations seam ground capacitive load Stepped Impedance antenna 13 can be mutually perpendicular to by draw-in groove and be installed together, or is mutually perpendicular to by binding agent and is bonded together, or two kinds of methods use together。
In accordance with the above, the present invention can just be realized。
Claims (6)
1. three polarization slot antennas of a grid seam ground coaxial feed capacitive load Stepped Impedance, it is characterised in that this antenna includes grid seam ground capacitive load Stepped Impedance antenna (13) of three single polarizations being mutually perpendicular to placement；Grid seam ground capacitive load Stepped Impedance antenna (13) of each single polarization include medium substrate (1), the metal that is arranged on medium substrate (1) ground (2) and radiate the line of rabbet joint (3), coaxial feeder (4)；The one side of medium substrate (1) is metal ground (2), and the outer conductor (5) of coaxial feeder (4) is affixed with metal ground (2) and is connected；Having the radiation line of rabbet joint (3) on metal ground (2), the shape of the radiation line of rabbet joint (3) is rectangle, the center of the radiation line of rabbet joint (3) with being positioned at metal (2)；Grid seam (6) array that upper a plurality of parallel gate seam (6) of metal ground (2) is constituted, the shape of grid seam (6) is rectangle, grid seam is positioned at the surrounding of the radiation line of rabbet joint (3), and grid seam (6) are mutually perpendicular to the radiation line of rabbet joint (3)；The short at one end of grid seam (6)；The other end open circuit of grid seam (6), is positioned at the edge of medium substrate (1)；Two terminal shortcircuits of the radiation line of rabbet joint (3)；At the radiation line of rabbet joint (3) mid portion, several electric capacity (7) is had to be connected in parallel across two edges of the radiation line of rabbet joint (3), make the characteristic impedance step-down of the radiation line of rabbet joint (3) mid portion, form the low-resistance line of rabbet joint (8)；The remainder of the radiation line of rabbet joint (3) is the high resistant line of rabbet joint (9), the high resistant line of rabbet joint (9) and the low-resistance line of rabbet joint (8) constitute the Stepped Impedance radiation line of rabbet joint (3) together, produce a relatively low low frequency operation frequency band of frequency and the higher high-frequency work frequency band of a frequency；Medium substrate (1) is passed through in metallization via (7), and one is connected with metal ground (2), and other end is at the another side of medium substrate (1)；One end of coaxial feeder (4) is the port (10) of antenna, the inner wire (12) of coaxial feeder (4) other end strides across the high resistant line of rabbet joint (9), at the edge (11) of the high resistant line of rabbet joint (9), with metal (2) be connected。
2. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load Stepped Impedance, it is characterized in that changing the thickness of medium substrate (1), pcrmeability and dielectric constant, the high resistant line of rabbet joint (9) and the characteristic impedance of the low-resistance line of rabbet joint (8) can be changed, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
3. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load Stepped Impedance, it is characterized in that changing the length of the low-resistance line of rabbet joint (8), the low-resistance line of rabbet joint (8) position in the radiation line of rabbet joint (3), the electrical length of the radiation line of rabbet joint (3) can be regulated, to realize antenna miniaturization in various degree, it is also possible to change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
4. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load Stepped Impedance, it is characterized in that change grid seam (6) array in adjacent gate seam the spacing of (6), grid seam the width of (6), grid seam (6) short-circuit end from radiation the line of rabbet joint (3) distance, thus it is possible to vary the operating frequency of antenna, working band width and radiation the line of rabbet joint (3) electrical length。
5. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load Stepped Impedance, it is characterized in that changing the quantity of loading capacitance (7), capacitance and spacing, the characteristic impedance of the low-resistance line of rabbet joint (8) can be regulated, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
6. three polarization slot antennas of a kind of grid according to claim 1 seam ground coaxial feed capacitive load Stepped Impedance, it is characterized in that changing the width of the radiation line of rabbet joint (3), the low-resistance line of rabbet joint (8) and the characteristic impedance of the high resistant line of rabbet joint (9) can be regulated, change the height impedance ratio of the Stepped Impedance radiation line of rabbet joint (3), and then change the operating frequency of the low frequency operation frequency band of antenna and the operating frequency of high-frequency work frequency band。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218869.2A CN105703073A (en) | 2016-04-08 | 2016-04-08 | Tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610218869.2A CN105703073A (en) | 2016-04-08 | 2016-04-08 | Tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance |
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| CN105703073A true CN105703073A (en) | 2016-06-22 |
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| CN201610218869.2A Pending CN105703073A (en) | 2016-04-08 | 2016-04-08 | Tri-polarized slot antenna of grid slit ground coaxial feed capacitor loaded step impedance |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
-
2016
- 2016-04-08 CN CN201610218869.2A patent/CN105703073A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123200B1 (en) * | 1990-05-02 | 2006-10-17 | Nortel Networks Limited | Sea surface antenna |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| CN104124527A (en) * | 2014-07-22 | 2014-10-29 | 南京邮电大学 | High-isolation slot antenna array |
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Application publication date: 20160622 |